Hydrogen fuel cell electric vehicles have been identified as one of the key solutions for significantly reducing the world’s reliance on fossil fuels, enabling reduced CO2 emissions, better air quality and security of energy supply. The UK is positioning itself as an early market for fuel cell electric vehicles (FCEVs), which are beginning to be sold by a number of major automotive OEMs in selected regions around the world. The lack of hydrogen refueling stations (HRS) is still presented as the main obstacle for the proliferation of fuel cell electric vehicles. The number of station in the UK is currently low, but plans exist to increase HRS numbers over the coming years. This guide, developed as part of the Innovate UK-supported London Hydrogen Network Expansion project, is designed to give organisations involved in the installation of hydrogen refueling stations the guidance needed for constructing and expanding the number of HRS.